changing matrix names in loops

Question

Leelai 2014-12-14

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/166544-changing-matrix-names-in-loops

回答： Image Analyst 2014-12-14

I am writing a script to load my data files which are in .mat form. right now the script loops through and loads all the files but the variable names for each file are the same, so every time the script loops the new file over writes the data from the previous file. I tried writing another loop to change the names but that is not working.

for j = 1:6
    for i = 1:2
        for k = [3,4,6]
              if i == 1
                  i = 'Ground';
              else
                  i = 'Sand';
              end
              if k == 3
                  k = '3';
              elseif k == 4
                  k = '4';
              else k == 6
                  k = '6';
              end
              load([i '_P0009_S00' k '_Int_Right.mat']);
              a(j) = AnkleAng_X;

I also tried using string manipulation to change the variable name everytime it loops but that also does not work

        for i = 1:2
            for k = [3,4,6]
                if i == 1
                    i = 'Ground';
                else
                    i = 'Sand';
                end
                if k == 3
                    k = '3';
                elseif k == 4
                    k = '4';
                else k == 6
                    k = '6';
                end
                load([i '_P0009_S00' k '_Int_Right.mat']);
                [i '_ankle_x_' k] = AnkleAng_X;

Does anyone have a solution to this problem?

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Answer 1

Image Analyst 2014-12-14

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/166544-changing-matrix-names-in-loops#answer_162274

在 MATLAB Online 中打开

What kind of variable is AnkleAng_X? Is it a scalar? A string? A vector or matrix or higher dimension array? How about if you just load it into a higher dimension array? Like if it's a row vector, just stuff it into a new row in a 2D matrix that you build up row by row?

By the way, you can use sprintf() and fullfile() to build up a filename:

baseFileName = sprintf('%d_P0009_S00%d_Int_Right.mat', i, k);
fullFileName = fullfile(folder, baseFileName);
if exist(fullFileName, 'file')
    thisStructure = load(fullFileName);
    a{j} = thisStructure.AnkleAng_X;
end